What is the constant of proportionality of the ratio of students surveyed to the number of a grades?

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.

I’m still confused on how to work the percentages

The volume of the sun is approximately 1 × 10^18 cu km, while the volume of jupiter is approximately 1 × 10^15 cu km. which of the following is true? a. the volume of jupiter is approximately one thousand times the volume of the sun. b. the volume of jupiter is approximately one hundred times the volume of the sun. c. the volume of the sun is approximately one thousand times the volume of jupiter. d. the volume of the sun is approximately one hundred times the volume of jupiter.